Water-tube boiler.



TATENTED 00T. so, [1906.

E. D. POTTER.- y y WATER TUBE BOILEE. APPJIOATIOI FILED HOV. 11,1905.

2 SHEETS--SHEET 1.

No. 834.640. PATBNTED OCT. 30, 1906 f T. D. POTTER. WATER TUBE BOILBR.

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` l W T i'Il` @Hornet V UNITED STATES PATENT oEEIoE.

I FREDERICK Poil-VIER, OF IID-EN, NEW JERSEY.

`WATER-TUBE BOILER.

Specification of Letters Patent. l

Patented Oct. 30, 1906.

Application filed November 11. 1905. Serial No. ZBIBO.

lo Water-tube boilers.

The invention aims to furnish a construee tlon having a high heating eihciency combined with ease 1n cleaning and repalrin In Water-tube boilers as heretofore uilt 15 the efficiency has been decreased by the fact -thathe headers are so constructed and arranged that only one nip le can be used to connecte header with a rum, and as a pluralityof Water-tubes are connected with a .zo single header the result' has been the chokin of the discharge from the headers, whichimpedes the circulation, and thereby lowers the heating efficiency of the boiler, and such has been the arrangement of the headers that it z 5 has heretofore been impracticable to remedy this difficulty. I, however, have overcome it by arranging Ithe header in a plane parall lel with a tangent plane of the drum, whereby I am able to connect a single header to 3o Athe drum by a plurality of nipples, thereby affording sulficient passages for the ready flow of the greatest,quantity of water necessary to attain the most efficient circulation. This arrangement of the headers with a plu- 3 5 rality of nipples also allows of reaching a greater number of water-tubes for cleaning and repair from the drums thanl is practicable in the case of only a single connec-tingnipple. i

4o I also employ in my improved boiler a plurality of baiies so disposed as to enforce a compound circulation of the hot products of combustion in Contact with the wateretubes, -whereby the water will absorb the reatest 45 practicable amount of heat from t e said .i products of combustion. I-also arrange the mud-drum to insure a positive circulation of the water through the tubes in accordance with the aforesaid circulation of the products 5o of combustion around the tubes, so that the hottest flamescome' into contact with the hottest water, which condition I have ascertained tobethat whichpromotes the hi hest boiler efficiency. I also greatly feci 'tate the removal and renewal f the tubes by my manner of arrangement with greater spaces between them at certain intervals,` alon which spaces the tubes may be moved. also provide means for insuring almost ractically perfect smokeless combustion, w ereby again I attain the highest boiler eiiiciency. Referring to the drawin s which accompany the specification to aid the description, Figure 1 is a broken longitudinal sectional elevation of an installation, but omitting 'much of the furnace-brickwork, since the same is not f e1' se any part of luy-invention and is well own in the art. Fig. 2 is a broken vertical sectional elevation of the same.. Fig. `3 is a broken vertical-section and elevation of a modification in the manner of arranging the drums, bacfles, and

tubes.

Referring to Figs. l and 2, 1 is the steam and water drum g 2, the mud-drum; 3 3, wa ter-tubes; 8, the upper and 20 the lower header, in which opposite ends of said tubes 3' 3 are respectively expanded, as is usual. Said upper header 8 is disposed in a plane which is substantially parallel with a tangent plane of the saiddrum, and the said header is connectedywith said drum by a 'pluralit of nipples 9 9which may be bent, if desire to enter them radially into the saidA drum. Similarly the lower headers 20 are substantially parallel with a tangent plane of the mud-drum 2 and are connected therewith by plurality of short nipples 21. The said pluralit of nipples, particularly connecting hea er 8 with drum 1, provides easy passage for the water from all the tubes 3 without choking the circulation and also renders access to a number ofthe water-tubes easy by way ofthe drum 1 and nipples 9, said drum 1 being provided, as usual, with suitable manholes. p Access to the remainin tubes is had by removing the caps 10. Sai water-tubes 3 are arranged, as seen in Fig. 1, withvrela-` tively Wide intervals 12 between each group of two. I might of course provide such Wide intervals between every tube and the next tube or between groups of more than two tubes; but the arrangement shown is preferable in practice; v'lhese said intervals 12 provide 1passage-ways for the ready withdrawal o an injure tube and insertion of a new one and are a valuable feature of myin# vention.

Pos

I provide deiiecting particles or baffles 26, 29, suitably supported, to cause the -hot products of combustion from the furnace F to have a compound circulation in contact with the tubes 3 on their way to the smokehole 2S in the rear wall 27, said baffles being also so arranged that the hottest flames come into Vcontact with the tubescontaining the hottest water. The circulation in the said tubes is in the direction of the arrows, Fig. l, and is further forced by the diaphragm 16 midway of the ends of the said mud-drum 2. Said diaphragm 16 has the further advantage of causing most of the mud and sedir lent to collect in the coldest end of the muddruni.

I preferably install my boilers with two furnaces F F, having a common bridge-wall V and contracted throats t t. By'this construction the said bridge-wall V and the furnace-walls X become incandescent and produce practically perfect smokeless combastion of the fuel. While, however, I prefer such double furnaces and consider the same a valuable feature of my invention, I do not, of course, limit myself thereto, since my invention is intended to cover my arran ement of headers, nipples, drums, and ba es with other furnaces. It will of course be understood that there will be a Wall and smoke-hole, res ectively, similar to 27 and 28 to the left of ig. l, these parts being omitted from the drawing, which is broken away, as aforesaid.

In Fig. 3 I illustrate a modification of my invention wherein there are two mud-drums 30 31, res actively, having the effect of the single mu -drum 2 and diaphragm 16 of Fig. l.. 'It will be seen. that in the said Fig. 3 I show the upper headers of the middle group of tubes as made in two separate parts, whereas the upper headers of the groups of. tubes at the extreme left .and ,extreme right 'of this figure are shown as made in one part, with which all the tubes of the grou. connect, and it is manifest that the hea ers in all the modifications can be made in either one or two parts, and it will also` be seen on comparing Figs. 2 and 3 that the nip les or tubes which connect the headers wit their respective steam drums are arranged in pairs, so that the corresponding tubes of each )air are respectively equally distant from a line drawn through the center of the steam-v drum and pei endicular to the plane ofthe header or hea ers. With such arrangement of mud-drums the headers 8', tubes 3', steam and water drums 35 36, and baffles 38 may be arranged as shown, said drums 35 36 being connected together by flow and return pipes 40 41, respectively. In this construction also there will preferably be a double furnace F F and the installation of drums, tubes, andbaes will be duplicated for the second furnace.

I claim-n 1. In a boiler installation, the combination of a furnace, steam-drum and mud-drum, staggered baliles between said drums, headers respectively connected with said steam-drum and said mud-drum and having their major axes respectively substantially perpendicular to the major axes of the said steam-drum and mud-drum and substantially arallel to planes tangential to said steamrum and mud-drum, and a plurality of nipples connecting said first-named headers with said steam-drum arranged in pairs, each nipple of the pair being at substantially the same distance from aline drawn through the axis ofthe said steam-drum perpendicular to the plane of said headers, substantially as described.

2. In a steam-boiler, the combination with a steam-drum and water-tubes'of a muddrum provided with a transverse partition ada ted to return the sediment in one end of sai mud-drum, substantially as described. 3. In a steam-boiler, the combination of a steam-drum, a mud-drum provided with a transverse partition adapted to retain the sediment in one end of said drum, headers connected with said mud-drum, headers and a plurality-of nipples connecting said headers with said steam-drum and arranged in pairs, each nipple of the pair being at substantially the same distance from a line drawn through the axis of the steam-drum perpendicular to the plane of the headers, an tubes connecting said headers, substantially as described.

4. The combination of a furnace a steam- '/drum, a header connected therewit a muddrum provided with a transverse partition adapted to aid in forcing a circulation in a certain direction, a header connected therewith, tubes connecting said headers, and staggered baffles arranged between said steam-drum 'and said mud-drum and between said tubes at points between the furnace and the smoke-flue and adapted to direct the hottest flames against the tubes containing the hottest water, substantially as described.

5. In a steam-boiler, the combination of a.

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hsteam-drum, a plurality of headers separate from said drum and connected therewith by l nip les and'arranged substantially parallel wit a plane tangentiallto said druniand at opposite sides of a plane through the axis of said drum substantially per endicular to the plane of said headers, a m`u -dru1n, a header separate therefrom and connected thereto by nipples and arranged substantially arallel wrt a plane tangent'ai to said mu -drum, and water tubes connectim said headers, substantially as described.

6. The combination m a steam-boiler, of a steam-drum, a mud-drum, headers respectively conneeted thereto extending to both sides of a.V planedrawn through the axis of Signed at New York city this 10th day of said'steamdruln substantially perpendicu- November, 1905.

larl to theplanes of said headers a plurality of nrpples connectingsaid headers with their FREDERICK POTTER 5 respeetlvke..- drums and ay plurality of waterl Witnesses:

' tlubesyconneoting said headers, substantially M. B. MEEHAN,

f WALTER N. HARRIS.

as described. 

